You are given an array of objects representing data for an international tech conference. Each object contains information about the country, city, venues, and sessions. Your task is to extract the country and city of the first conference.
Extract the names of all the venues for the second conference, and store the remaining venue details in an array remainingVenues. For the first conference, extract the title of the first session, the name of the second speaker in the first session and store the remaining session details in an object remainingSessions. Use default values for any missing session or venue details.